Diisodecyl phthalate

Diisodecyl phthalate (DIDP) is a commonly used plasticizer used in the production of plastic and plastic coating to increase flexibility. It is a mixture of compounds derived from the esterification of phthalic acid and isomeric decyl alcohols.

Diisodecyl phthalate

Names
Preferred IUPAC name Bis(8-methylnonyl) benzene-1,2-dicarboxylate
Other names Bis(8-methylnonyl) phthalate Bis(isodecyl) phthalate
Identifiers
CAS Number	26761-40-0^Y 68515-49-1^N
3D model (JSmol)	Interactive image
ChemSpider	30996
ECHA InfoCard	100.043.601
PubChem CID	33599
UNII	WF93T741QI^Y
CompTox Dashboard (EPA)	DTXSID50274032
InChI InChI=1S/C28H46O4/c1-23(2)17-11-7-5-9-15-21-31-27(29)25-19-13-14-20-26(25)28(30)32-22-16-10-6-8-12-18-24(3)4/h13-14,19-20,23-24H,5-12,15-18,21-22H2,1-4H3 Key: ZVFDTKUVRCTHQE-UHFFFAOYSA-N
SMILES O=C(OCCCCCCCC(C)C)C1=CC=CC=C1C(OCCCCCCCC(C)C)=O
Properties
Chemical formula	C28H46O4
Molar mass	446.672 g·mol^−1
Density	0.96-0.97 g/cm^3 at 20 °C[1]
Melting point	−50 °C (−58 °F; 223 K)[1]
Boiling point	250 to 257 °C (482 to 495 °F; 523 to 530 K) at 0.5 kPa [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

The coating on furnishings, cookware, pharmaceutical pills, food wrappers and many other products may have DIDP or other phthalates in them. There has been recent concern in the US and European Union for their toxicity and bioaccumulative quality. The European Union has set a maximum specific migration limit from food contact materials of 9 mg/kg food for the sum of diisodecyl phthalates and diisononyl phthalates.[3]

DIDP has been listed since 2007 under Proposition 65 as a substance known to the state of California to cause reproductive toxicity.[4] The similar compound DINP is also listed.

In 2013, ECHA’s Risk Assessment Committee (RAC) concluded that Di-isodecyl phthalate (DIDP) does not warrant classification for reprotoxic effects under the EU’s Classification, Labelling and Packaging (CLP) regulation. [5]

See also

• DPHP, a similar phthalate ester

References

1. Record of CAS RN 26761-40-0 in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on Sep 27, 2007.
2. NIOSH. "International Chemical Safety Cards". NIOSH. Archived from the original on 2017-06-14. Retrieved 2017-09-09.
3. "EU legislative list for food contact materials".
4. "OEHHA Proposition 65 List of Chemicals".
5. https://echa.europa.eu/documents/10162/31b4067e-de40-4044-93e8-9c9ff1960715